<template>
  <div>
    <el-form
      v-loading="loading"
      element-loading-text="正在登录..."
      element-loading-spinner="el-icon-loading"
      element-loading-background="rgba(0, 0, 0, 0.8)"
      :rules="rules"
      :model="loginForm"
      ref="loginform"
      class="loginContainer"
    >
      <h3 class="loginTitle">系统登录</h3>
      <el-form-item prop="username">
        <el-input
          type="text"
          v-model="loginForm.username"
          auto-complete="false"
          placeholder="请输入用户名"
        ></el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          type="password"
          v-model="loginForm.password"
          auto-complete="false"
          placeholder="请输入密码"
        ></el-input>
      </el-form-item>
      <el-form-item prop="code">
        <el-input
          size="normal"
          type="text"
          v-model="loginForm.code"
          auto-complete="false"
          placeholder="点击图片更换验证码"
          style="width: 250px; margin-right: 5px"
        ></el-input>
        <img :src="captchaUrl" @click="updateCaptcha" />
      </el-form-item>
      <div class="loginRemember">
        <el-checkbox v-model="checked">记住我</el-checkbox>
      </div>
      <el-button @click="submitLogin('form')" type="primary" style="width: 100%">登录</el-button>
    </el-form>
  </div>
</template>
<script>
export default {
  name: 'Login',
  data () {
    return {
      captchaUrl: '/captcha?time=' + new Date(),
      loginForm: {
        username: 'admin',
        password: '123',
        code: ''
      },
      loading: false,
      checked: true,
      // 校验规则
      rules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
        ],
        password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
        code: [{ required: true, message: '请输入验证码', trigger: 'blur' }]
      }
    }
  },
  methods: {
    updateCaptcha () {
      this.captchaUrl = '/captcha?time=' + new Date()
    },
    submitLogin () {
      this.$refs.loginform.validate((valid) => {
        if (valid) {
          this.loading = true
          this.postRequest('/login', this.loginForm).then(resp => {
            this.loading = false
            if (resp) {
              // 存储用户token
              const tokenStr = resp.obj.tokenHead + resp.obj.token
              window.sessionStorage.setItem('tokenStr', tokenStr)

              // 页面跳转
              const path = this.$route.query.redirect
              this.$router.replace((path === '/' || path === undefined)
                ? '/home' : path)
            }
          })
        } else {
          this.$message.error('请输入所有字段')
          return false
        }
      })
    }
  }
}
</script>
<style>
.loginContainer {
  border-radius: 15px;
  background-clip: padding-box;
  margin: 180px auto;
  width: 350px;
  padding: 15px 35px 15px 35px;
  background: #fff;
  border: 1px solid #eaeaea;
  box-shadow: 0 0 25px #cac6c6;
}
.loginTitle {
  margin: 0px auto 40px auto;
  text-align: center;
  color: #505458;
}
.loginRemember {
  text-align: left;
  margin: 0px 0px 15px 0px;
}
.el-form-item__content {
  display: flex;
  align-items: left;
}
</style>
